LDRD report: Smoke effects on electrical equipment

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Description

Smoke is known to cause electrical equipment failure, but the likelihood of immediate failure during a fire is unknown. Traditional failure assessment techniques measure the density of ionic contaminants deposited on surfaces to determine the need for cleaning or replacement of electronic equipment exposed to smoke. Such techniques focus on long-term effects, such as corrosion, but do not address the immediate effects of the fire. This document reports the results of tests on the immediate effects of smoke on electronic equipment. Various circuits and components were exposed to smoke from different fields in a static smoke exposure chamber and were ... continued below

Physical Description

44 p.

Creation Information

TANAKA,TINA J.; BAYNES JR.,EDWARD E.; NOWLEN,STEVEN P.; BROCKMANN,JOHN E.; GRITZO,LOUIS A. & SHADDIX,CHRISTOPHER R. March 1, 2000.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Smoke is known to cause electrical equipment failure, but the likelihood of immediate failure during a fire is unknown. Traditional failure assessment techniques measure the density of ionic contaminants deposited on surfaces to determine the need for cleaning or replacement of electronic equipment exposed to smoke. Such techniques focus on long-term effects, such as corrosion, but do not address the immediate effects of the fire. This document reports the results of tests on the immediate effects of smoke on electronic equipment. Various circuits and components were exposed to smoke from different fields in a static smoke exposure chamber and were monitored throughout the exposure. Electrically, the loss of insulation resistance was the most important change caused by smoke. For direct current circuits, soot collected on high-voltage surfaces sometimes formed semi-conductive soot bridges that shorted the circuit. For high voltage alternating current circuits, the smoke also tended to increase the likelihood of arcing, but did not accumulate on the surfaces. Static random access memory chips failed for high levels of smoke, but hard disk drives did not. High humidity increased the conductive properties of the smoke. The conductivity does not increase linearly with smoke density as first proposed; however, it does increase with quantity. The data can be used to give a rough estimate of the amount of smoke that will cause failures in CMOS memory chips, dc and ac circuits. Comparisons of this data to other fire tests can be made through the optical and mass density measurements of the smoke.

Physical Description

44 p.

Notes

INIS; OSTI as DE00752612

Medium: P; Size: 44 pages

Source

  • Other Information: PBD: 1 Mar 2000

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Identifier

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  • Report No.: SAND2000-0599
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/752612 | External Link
  • Office of Scientific & Technical Information Report Number: 752612
  • Archival Resource Key: ark:/67531/metadc710010

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • March 1, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • April 12, 2017, 4:41 p.m.

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Citations, Rights, Re-Use

TANAKA,TINA J.; BAYNES JR.,EDWARD E.; NOWLEN,STEVEN P.; BROCKMANN,JOHN E.; GRITZO,LOUIS A. & SHADDIX,CHRISTOPHER R. LDRD report: Smoke effects on electrical equipment, report, March 1, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc710010/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.